Filing Motion for Leave as a Defendant

I was served by a Dep. Sheriff for Absolute Divorce, I filed my answer and Coubterclaims within the 30 day period. I didn’t notarize my Counterclaim. Now the Plaintiff served me with Motion For Leave to Amend. Can I add my Counterclaim (original one) in filing my Amended reply and Notirize it. How many days am I given to file my reply ? PLEASE help. Thanks.